import * as types from './mutations-types'
import {playMode} from '@/common/js/config'
import {shuffle} from '@/common/js/util'

function findIndex(list, song){
    return list.findIndex((item) => { return item.id === song.id })
}

export const selectPlay = function({commit,state},{list, index}){
    commit(types.SET_SEQUENCE_LIST, list)
    if (state.mode === playMode.random) {
        let randomList = shuffle(list)
        commit(types.SET_PLAYLIST, randomList)
        index = findIndex(randomList, list[index])
    } else {
        commit(types.SET_PLAYLIST, list)
    }
    commit(types.SET_CURRENT_INDEX, index)
    commit(types.SET_FULL_SCREEN, true)
    commit(types.SET_PLAYING_STATE, true)
}
// 随机播放所有歌单的所有歌曲
export const randomPlay = function({commit},{list}){
    commit(types.SET_PLAY_MODE, playMode.random)
    commit(types.SET_SEQUENCE_LIST, list)
    let randomList = shuffle(list)
    commit(types.SET_PLAYLIST, randomList)
    commit(types.SET_CURRENT_INDEX, 0)
    commit(types.SET_FULL_SCREEN, true)
    commit(types.SET_PLAYING_STATE, true)
} 